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Steel tubes for mechanical engineering, machine components and general use


Steel tubes have an irreplaceable role for their unique characteristics, i.e. wide range of sizes, variety of available steel grades and welding ability. Tubes for mechanical engineering and parts of machines are used for manufacturing in various types of machine parts and at the same time they can be used in many other industrial areas.

Possible applications of steel tubes:

  • pressure vessels
  • parts and the axis of the machine units
  • construction elements of machines
  • basis and supports of machines
  • design features for storages and containers
  • fixtures for tools
  • parts of agricultural machinery
  • conveyor belts
  • elements of ships
Steel tubes for mechanical engineering, machine components and general use

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Mechanical tube sizes

OUTER DIAMETER (OD)10,2 – 139,7 mm
WALL THICKNESS (WT)0,5 – 16,0 mm
EUROPEAN STANDARDSEN 10294-1, EN 10297-1,
EN 10305-1,
DIN 2448,
BS 6323/3,
NF A 49-311,
UNI 4991, UNI 7729,
STN/ČSN 42 5715,
STN/ČSN 42 5716,
and PN-H 74219.
RUSSIAN STANDARDSGOST 8732
AMERICAN STANDARDSASTM A 53
and ASTM A 519
JAPANESE STANDARDSJIS G 3445
for mechanical treatment – machine parts and general useSeamless steel tubes15
Dimensional standard SIZES (OD x WT) Dimensional table
EN 10294-1 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
EN 10297-1 (10220) 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
ASTM A519 31.75 x 2.34 – 139.7 x 12.7 mm [1.250 x 0.088 – 5.500 x 0.500 in] [13 – 7/0 GA] Dimensional table
ASTM A53 10.3 x 1.24 – 114.3 x 13.49 mm [0.405 x 0.049 – 4.500 x 0.531 in] [1/8 – 4 NPS] Dimensional table
GOST 8732 20.0 x 2.5 – 140.0 x 16.0 mm Dimensional table
JIS G3445 15.9 x 1.2 – 114.3 x 9.5 mm Dimensional table
Withdrawn standards They may still be used occasionally
BS 6323-3 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
DIN 2448 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
NF A 49-311 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
NF A 49-312 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
UNI 7729 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
UNI ISO 4200 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
PN – H 74219 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
STN 42 5715 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table
STN 42 5716 10.2 x 0.5 – 139.7 x 16.0 mm Dimensional table

Steel grades for tubes intended for mechanical engineering

EN 10297-1
EN 10083-2		E235, E275, E315, E355, E420, E460, E470, E275K2, E355K2, E460K2, E420J2, 20MnV6, 16MnCr5, 20NiCrMo2-2, 25CrMo4, 28Mn6, 30CrMo4, 34CrMo4, 38Mn6, 42CrMo4, C10E, C15E, C15R, C22E, C35E, C45E, C60E.
ASTM A 53/A530
ASTM SA53/SA 530		Grade A, Grade B.

for mechanical treatment – machine parts and general useSeamless steel tubes199
Standard TDC Steel grade (open product)
EN 10297-1 E355K2
EN 10297-1 E460K2
EN 10297-1 20NiCrMo2-2
EN 10297-1 30CrMo4
EN 10297-1 25CrMo4
EN 10297-1 42CrMo4
EN 10083-2 C22E
EN 10294-1 20MnV6+AR
EN 10083-2 C35R
EN 10297-1 C60E
EN 10084 C10E
EN 10083-2 C22
EN 10297-1 E420J2
EN 10297-1 E355
EN 10083-2 C30E
EN 10294-1 E355+N
EN 10294-1 E355+AR
EN 10297-1 E470
EN 10083-2 C30R
EN 10083-2 C40E
EN 10083-2 C35E
EN 10083-2 C35
EN 10297-1 E235
EN 10084 C10R
EN 10297-1 E315
EN 10083-2 C40
EN 10083-2 C40R
EN 10297-1 38Mn6
EN 10084 C15E
EN 10083-2 C55R
EN 10297-1 E275K2
EN 10294-1 20MnV6+N
EN 10297-1 34CrMo4
EN 10084 C16R
EN 10083-2 C25R
EN 10083-2 C22R
EN 10083-2 C30
EN 10083-2 C45E
EN 10084 C16E
EN 10297-1 E275
EN 10083-2 C45
EN 10084 C15R
EN 10083-2 C25
EN 10083-2 C55E
EN 10083-2 C25E
EN 10084 16MnCr5
EN 10083-2 C50R
EN 10083-2 C55
EN 10083-2 C45R
EN 10083-2 C50
EN 10083-2 C50E
EN 10083-2 28Mn6
ASTM A53/A530 Grade B
ASTM A53/A530 Grade A
ASTM A519 1030
ASTM A519 1018
ASTM A519 MTX1020
ASTM A519 1524
ASTM A519 1518
ASTM A519 MT1015
ASTM A519 1035
ASTM A519 1541
ASTM A519 1021
ASTM A519 1012
ASTM A519 1022
ASTM A519 1019
ASTM A519 1016
ASTM A519 1026
ASTM A519 1040
ASTM A519 1020
ASTM A519 1010
ASTM A519 MT1010
ASTM A519 1008
ASTM A519 1045
ASTM A519 MTX1015
ASTM A519 1015
ASTM A519 1025
ASTM A519 1050
ASTM A519 1017
ASTM A519 MT1020
GOST 8731 / 1050 10
GOST 8731 / 1050 45
GOST 8731 / 1050 35
GOST 8731 / 1050 20
GOST 8731 / 19281 09G2S
JIS G3445 STKM12A
JIS G3445 STKM16A
JIS G3445 STKM14A
JIS G3445 STKM17C
JIS G3445 STKM13B
JIS G3445 STKM13C
JIS G3445 STKM14C
JIS G3445 STKM15C
JIS G3445 STKM16C
JIS G3445 STKM19A
JIS G3445 STKM12C
JIS G3445 STKM20A
JIS G3445 STKM14B
JIS G3445 STKM19C
JIS G3445 STKM12B
JIS G3445 STKM15A
JIS G3445 STKM13A
JIS G3445 STKM11A
JIS G3445 STKM17A
JIS G3445 STKM18B
JIS G3445 STKM18A
JIS G3445 STKM18C
Withdrawn standards They may still be used occasionally
BS 6323-1,3 HFS 4
BS 6323-1,3 HFS 8
BS 6323-1,3 HFS 3
BS 6323-1,3 HFS 5
DIN 17204 Cm 35
DIN 1630 St 37.4
DIN 17204 C 55
DIN 1629 St 37.0
DIN 17204 Ck 45
DIN 1629 St 52.0
DIN 17204 C 22
DIN 1630 St 52.4
DIN 17204 Ck 55
DIN 17200 Cm 55
DIN 17210 Ck 10
DIN 17210 Ck 15
DIN 17204 Cm 45
DIN 17210 C 10
DIN 17204 C 35
DIN 1629 St 44.0
DIN 17210 16MnCr5
DIN 17204 C 45
DIN 17210 Cm 15
DIN 17210 C 15
DIN 1630 St 44.4
DIN 17204 Ck 35
DIN 17204 Ck 22
DIN 17204 Cm 22
NF A 49-311 TU 56-b
NF A 49-312 S 470M
NF A 49-311 TU 37-b
NF A 49-312 S 450MG2
NF A 49-311 TU 52-b
NF A 49-311 TU XC 35
UNI 7729 Fe 540
UNI 663 Fe 52-2
UNI 663 Fe 52-1
UNI 663 Fe 45-2
UNI 663 Fe 35-2
UNI 663 Fe 55-1
UNI 7729 Fe 360
UNI 663 Fe 45-1
UNI 7729 Fe 510
UNI 663 Fe 35-1
UNI 663 Fe 55-2
PN – H 74219 / 84019 55
PN – H 74219 / 84019 45
PN – H 74219 / 84023 R35
PN – H 74219 / 84019 35
PN – H 74219 / 84023 R55
PN – H 74219 / 84018 18G2A
PN – H 74219 / 84023 R45
PN – H 74219 / 84023 R65
PN – H 74219 / 84019 20
PN – H 74219 / 84018 18G2
PN – H 74219 / 84019 10
STN 42 0250 11 550
STN 42 0250 12 050
STN 42 0250 12 060
STN 42 0250 11 523
STN 42 0250 11 353
STN 42 0250 11 550
STN 42 0250 11 650
STN 42 0250 11 453
STN 42 0250 12 060
STN 42 0250 11 523
STN 42 0250 12 040
STN 42 0250 11 503
STN 42 0250 11 353
STN 42 0250 11 453
STN 42 0250 11 503
STN 42 0250 11 650
STN 42 0250 12 050
STN 42 0250 12 040
ČSN 42 0250 11 453
ČSN 42 0250 11 523
ČSN 42 0250 11 453
ČSN 42 0250 11 503
ČSN 42 0250 11 550
ČSN 42 0250 12 060
ČSN 42 0250 11 650
ČSN 42 0250 12 050
ČSN 42 0250 11 650
ČSN 42 0250 12 060
ČSN 42 0250 12 050
ČSN 42 0250 11 550
ČSN 42 0250 11 523
ČSN 42 0250 12 040
ČSN 42 0250 11 503
ČSN 42 0250 12 040
ČSN 42 0250 11 353
ČSN 42 0250 11 353

Tube lengths for mechanical engineering

Usually the tubes are supplied in the production length (5 to 6 meters). A precise length may be supplied upon request.

Tube testing

According to EN 10294 – 1 standards the tubes are subjected to specific testing which consists of:

a, cast analysis,
b, tensile test and notched impact strength test (where possible),
c, dimensional inspection,
d, visual inspection.

Additionally according to the EN 10297 – 1 we can provide:

a, nonspecified testing for the steels grade 2.1.1 if by choice there is no agreement about a specific test
b, specific testing for other grades of steel.

The mandatory tests for nonspecified testing are in concurrence with the EN 10294-1, the optional tests are shown in the standards.

Tube surface protection

While ordering, it is necessary to agree upon the method and means of temporarily protecting the surface of the tubes during transportation and storage.

The tubes may be supplied without temporarily preservation of the surface or with an agreed upon preservative.

Tube ends

The tubes with deburred ends or ends customized for welding.
The tubes with deburred ends or ends customized for welding.
The ends are vertical to the longitudinal axis and are without burrs.
The ends are vertical to the longitudinal axis and are without burrs.

Deburring applies to:

Deburring
  • Tube OD: 26,7 – 114,3 mm
  • Tube WT: 3,2 – 12,5 mm
  • Tube lengths: 4 – 13 m
  • Deburring angle, α (alpha): 30°+5°, 37,5°±2,5°
  • Dimension, c: 1,6 ± 0,8 mm

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Packaging of mechanical tubes

(a) tubes bound with a steel band,
(b) tubes wrapped in plastic sheets, burlap,
(c) tubes in wooden crates.

Tubes are supplied in packages with a circular or hexagonal outline with weight of 300 to 3 500 kilograms.

Packaking-STANDARD-tubes bound with a steel band
Packaking-STANDARD-tubes bound with a steel band
Packaking-STANDARD-bundle tied down by steel strap underlaid by paper
Packaking-STANDARD-bundle tied down by steel strap underlaid by paper
Packaking-STANDARD-PLUS-paper tape and polyethylene foil
Packaking-STANDARD-PLUS-paper tape and polyethylene foil
Packaking-STANDARD-PLUS-the bundle placed into a wooden box
Packaking-STANDARD-PLUS-the bundle placed into a wooden box
Packaking-PREMIUM-B-into a wooden box in which the tubes are wrapped in foil
Packaking-PREMIUM-B-into a wooden box in which the tubes are wrapped in foil
Packaking-PREMIUM-C-the bandles are wraped into and plastic foil
Packaking-PREMIUM-C-the bandles are wraped into and plastic foil
Packaking-PREMIUM-D-placing the whole shipment into foil+vacuum sealed
Packaking-PREMIUM-D-placing the whole shipment into foil+vacuum sealed

Marking of tubes and tube bundles

(a) without marking,
(b) marked with colored stripes on the tubes (tube bundles),
(c) marked with spray either by a white or black color using InkJet,
(d) marked by stamping the data (this applies to OD > 22 mm and WT >2.3 mm).

Marked by a label
Marked by a label
Marked by stamping the data
Marked by stamping the data
Marked with spray either by a white or black color using InkJet
Marked with spray either by a white or black color using InkJet
Laser marking
Laser marking

Certified test reports

Certified test reports are issued according to the appropriate TDC standards:
EN 10204,
for
EN 10294-1		certificate 3.1.B,
EN 10297-1(a) nonspecified testing 2.1 and 2.2,
(b) specified testing – 3.1.B or others


Tube straightness

1.5 x 1000 is the required straightness for the tubes that have diameter up to 33.7 mm and which are intended for machine components.

For tubes that are going to be mechanically machined the required straightness is 1: 1000, i.e. 0.001 x L.

The condition, delivery and surface

Hot rolled tubes made out of carbon steel do not go through further heat treatment and their condition is the same as the condition of normally annealed tubes.


After forming, the cold drawn tubes are heat treated in such a way that they would meet the requirements of the appropriate standards as far as the condition of delivery and the mechanical values are concerned.

The inner and outer surface of the tubes corresponds to the manufacturing means.



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